Pitch Roof Slab
Pitch Roof Slab
(OP)
Hi, I am looking for anyone with experience with Reinforced Concrete Pitch Roof Slab (Hip Roof) who can help/advise on the right pitch and principles involved in this type of construction. Many thanks in advance for your input.






RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
Maybe contact a precaster and have them make roof panels.
RE: Pitch Roof Slab
Mike McCann
MMC Engineering
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
RE: Pitch Roof Slab
Mike McCann
MMC Engineering
RE: Pitch Roof Slab
BA
RE: Pitch Roof Slab
BA
RE: Pitch Roof Slab
The roof needs to be in Reinforced Concrete to grade 30. I am not looking for information about wind loading and steel reinforcement and so on. I am looking for advices, hints on optimum and practical design for a safer structural stabiity, for drainage of rain water. Here the ridge is at the very center of the building with the disadvantage that it is not aligned to the vertical supporting unit in the form of hollow concrete blocks, beam and columns which extend from one end to the other end of the building. I am also looking for information regarding pitch. I have seen many time people using an angle of 27 degree which they get with a rise of 50 for every run of 100. In my case and which is quite the norm here, the angle is usually 22.5 or 30 degree. This is a hip roof on 200 mm. wall/beam/column support.
Thanks in advance for your help.
RE: Pitch Roof Slab
Pitch required for drainage depends on the type of roofing materials you intend to use. The minimum recommended slope for drainage is about 1:50 or about 1.15o when the surface is smooth.
For asphalt shingles, the recommended minimum slope is 1:3 or about 18o but this can be reduced with other types of shingle or other types of roofing material.
Sometimes a steeper pitch is used to reduce snow load in areas where snowfall is known to be very high. Sometimes it is chosen by the architect in order to achieve a particular appearance, but roof pitch is rarely dictated by structural or drainage requirements.
BA
RE: Pitch Roof Slab
Hope this make sense. Looks like a nice little bomb shelter to me!
As far as roof slope, it appears this is purely driven by the architect and the appearance of a gabled roof system. As far as drainage, BA nailed it.. 1/4" / foot is the norm ... or 1:48.